Continuous- and Discrete-Time Stimulus Sequences for High Stimulus Rate Paradigm in Evoked Potential Studies

Figure 1

(a) A schematic diagram of a stimulus loop that contains 17 individual stimulus impulses to indicate the repetitive presentations in an experiment. (b) A sweep of stimulus sequence with impulses occurring at 𝑡_𝑝(𝑝=1,2,3,…,17) to represent a period of stimulus loop in time domain (𝑇=1545.5 ms; 𝑓₀=0.647 Hz). (c) A portion of the Fourier spectrum of the inverse filter |𝑆_𝑇(𝑗𝑘𝑓₀)|⁻¹. Note that within the frequency band of interest ([𝑓^′_𝐿,𝑓^′_𝐻]=[5,120] Hz), |𝑆_𝑇(𝑗𝑘𝑓₀)|⁻¹ is all below the threshold (𝜃=1).